PDFEncryptsoftware is a very flexible and powerful program, it allows you to encrypt (using 40-bit, 128-bit, AES encryption) existing PDF, set permission, add user and owner password. For example you can encrypt a PDF without allowing to print it.

This sophisticated piece of software turns your computer into a modern, State-of-The-Art spectrum analyzer giving you features that go far beyond the possibilities of any stand-alone hardware unit.VST Plugin support